A simple method to calculate single-well dynamic reserves of water-drive gas reservoirs based on Havlena-Odeh method;

By collecting previous research results of water-drive gas reservoirs and analyzing their macro and micro mechanisms of water encroachment,different development measures are designed respectively for their three development periods of water-free gas recovery,gas flowing with water and water-discharge gas recovery.

Several methods to calculate dimensionless water influx have disadvantages due to the particular features of accurate water influx solutions for water drive gas reservoir models.

The method of calculating the reserve and water influx of water drive gas reservoir by using ma- terial banlance method is improved.

This paper introduces the performance rule prediction for water withdrawal in gas production in water drive gas reservoir, using the material balance method.

In respect of water drive gas reservoirs, in particular the active ones, the water influx helps to maintain the reservoir pressure, and thus maintain gas productivity at initial productivity, at least until water breakthrough.

A large proportion of developed gas field are water drive gas reservoirs so that making a deeply study of it will contribute to exploiting a gas reservoir more rationally and more efficiently.

Based on the usual production data and using the three layers perceptron of artificial nerve net inside and BP calculation ways, the dynamic prediction of water-bearing gas reservoir with multi-fracture was carried out.